Rotary pump.



J. HINSCH.

ROTARY PUMP.

APPLICATION FILED MAY Il. ISI?.

Patented Dec. 10, 1918.

2 SHEETS-SHEET l.

max02@ l J. HINSCH. ROTARY PUMP. APPLICATION FILED MA'YII. 1917.

Patented Deo. 10, 1,918.

2 SHEETS-SHEET 2.

'converted into a Specification of Letters Patent.-

ROTARY PUMP.

Patented Dec. 10, 1918.

application med May11,1917. serial No. 168,032.

To all whom a may concern:

Be it known that I, JoHANNEsHINsoH, a subject of the King of Denmark, and resident of Spandau, nea-r Berlin, Germany have invented certain new and useful Improvements in Rotary Pumps, of which the following is -a speci cation.

My invention relates to rotary pumps and in particular to pumps of the centrifugal type. Its object is to provide a pump of high capacity which allows of being easily pump of4 different output and head without requiring any changes t0 be made on the casing.

According to my invention the shaft centralllyY located in the casing is arranged to receive aplurality of Wheels, which may all be blade-wheels, some of which however may be replaced by solid disks. To this end the wheels and disks are made easily removable from the shaft. In the case where a pump having a large outpfult is the blade wheels can be arranged to work in parallel, and in those cases where it is desired to obtain a high head, the blade wheels may be arranged in several stages, the conversion of one type into the other being in all cases an operation of the utmost simplicity.

My invention will be described with reference to the drawings affixed to the specificarequired,

tlon and forming part thereof, although it is to be understood that many modifications may be made in the devi-ces and combinations herein described without departing from the principle In the drawings of combinations to be obtainedwith a pump according to my invention, Figures 1 to 5 representing combinations to be effected in a pump of a small a larger type.

Fig. l is a vertical longitudinal section of a small type of pump according to my inventiom Fig. 2 is a like view of the same of my invention.

pump drawn in a purely diagrammatic' manner, same as the rest of the figures. Fig. 3 is a horizontal longitudinal section of the pump shown in Figs. land 2. Figs. 4 and 5 are vertical longitudinal sections of the same type of pump showin the arrangement of wheels after having j een converted into pumps of a different capacity. Figs.v

der and connecting its I have shown a number type, Figs. 6 to 8 showing' acting in an Awheels 6 and 11 6, 7 and 8 arevertical longitudinal sections of a compound ump with its blade wheels arranged in di erent ways, so as to represent three pumps of different capacity and head respectively.

Referring to Figs. l, 2, and 3 the casing substantially consists of the pump cylinder proper l, easily removable covers 2, 2 closing 'the cylinder at both ends and a longitudinal passage 3 arranged above Vthe cylin'- ends. 4 is the central shaft running in bearings 5 provided in the covers. is a solid flanged disk, all being removably arranged on the shaft. 9 is the inlet and l0 the discharge branch disposed on oppo site sidesof the casing and on different sides of the center, the solid disk 8 serving as a partition between the two. ',Both blade wheels are acting in the same direction (from the right to the left). The water or other medium .'to be conveyed on being drawn in through the inlet 9 by the action of Iblade Wheel 6, after vhaving passed through said wheel, is forced into the longitudinal passage 3 and is drawn from it by blade wheel 7 through the discharge o ening 10.

The pump here descri ed is a two-stage pump whose head is double the head of a pump provided with a single blade wheel, while the water volume delivered is equal to that delivered by a single wheel pump.

The converted into a single `stage pump, as shown in Fig. 4, delivering an equal water volume by simply removing the blade wheel 17. The water drawn in through inlet 9 by the action of blade wheel 6 is pressed through the longitudinal passage 3 into the discharge branch 10. j

By replacing the solid disk in a pump of this latter type by a secondy blade-wheel opposite sense to blade' wheel 6 a single-stage pump of increased head 1s obtained. As shown in Fig. l5 two blade are arranged on the shaft on Iboth sides of the inlet 9, blade wheel 6 'acting' from the right to the left and blade wheel 1l from the left to the right. The water is drawn in through the inlet 9 by the action of both wheels, and while wheel 6 serving to deliver it4 pump here described lmay easily be 6 and 7 are blade wheels and 8 presses the water passing through it into the longitudinal passage '3, blade wheel ll. causes the water passing through it to leave the casing directly through the outlet 10. By this arrangement the output obtained is double that of the pumps described before.

The pumps shown in Figs. 6 to 8 may be said to 'be combinations of two pumps as shown in Figs. l to 5 with the exception of the inlet and discharge branches which in this type of pump are arranged diametrically opposite each other in the middle of .double that 4of the pumps the casing.

ln the modification shown in Fig. 6 the tivo halves of the pump are arranged to act in the same manner, blade wheels y6 drawing the water in through the inlet 9 and pressing it. into a longitudinal passage 12 arranged below the pump cylinder, while blade wheels 1l draw the water from these passages and press it into the discharge branch 10, the full disks 8 serving as partitions between the two suction chambers on each side. This um is a two-stage pump having an output shown in Figs. 3

and 4.

The modification shown in Fig. 7 diii'ers from the one just described in that the left hand disk 8 has been replaced by theadj acent blade wheel 1l, the corresponding blade wheel l1 on the other side having been re,- moved entirely. 'In this way a single-stage pump is obtained having a capacity three times as high as that of the pumps shown 1nl 3 and 1i.

Fi s

'lhe pum-p shown in Fig. 8 has a still.

higher capacity. combination of shown in Fig.

It may be said to be a two pumps of the type 5 inasmuch as two blade wheels acting in diferent directions are arranged near each end of the inlet passage, no solid disk being provided, This pump is a single-stage pumphaving a capacity Vfour times as high as that of the pumps shown in Figs. 3 and Ll.

It is clear that the drawings show merely a few of the different arrangements and combinations to be made in order to obtain p pumps of different head and capacity. Thus by placing in a casing according to Figs. 6 to 8 three solid disks and only a single blade wheel, a single-stage pump having a capacity equal to that shown in Figs. 3 and 4 wouldbe obtained. By increasing disks serve as balancing the number of blade wheels the head and capacity may be increased also at will.-

lt is an easy matter in this vtype of pump to arrange the blade wheels in such a manner that the shaft is balanced in all cases against' .axial pressure. To this end the blade wheels and solid disks are arranged on the shaft in such a way that the solid disks for the blade wheels.

l further prefer arranging theV blade wheels in such a manner that the stuffing boXes of the pump are surrounded by pressure waiter in order to avoid their being affected by the diminished pressure on the suction side.

` The end covers 2, 2 of the casing being 'l0 easily removable and the boring of the casing being cylindrical throughout, the shaft and Wheels can easily be removed from the casing whenever it is desired to replace one or a plurality of wheels by solid disks or vice versa.

' I wish it to be understood that the con'- structional features shown in the figures and quite especially in Fig. 1 of the drawing are of'no avail as -far as my invention 80 is concerned, which is absolutely independent of any special mode of construction beyond 'what has been embodied in the claims.

I claim t y l. A rotary pump mprising a cylinder, 85 an inlet and an outlet on said cylinder, a shaft centrally'located in saidcylinder, at least one blade wheel and at least one solid disk removably fastened to said shaft, said disk being arranged to bar the direct passage between said blade wheel and said outlet, and a longitudinal passage extending JOHANNES HINSCH. 

